DSC_Lite: Add version support

When multiple versions of a dsc resource exist on the target system, version can be used to select the appropriate resource.

To implement this, add dsc_resource_module attribute to dsc type, remove dsc_resource_module_name. The dsc_resource_module property will be either a single string or a single hash, allowing the user to either specify a DSC Resource name or a DSC Resource Name and Version at the same time. The DSC Resource name can either be the name of the DSC Resource or a fully qualified path to the DSC Resource on the file system.

dsc {'foouser':

  dsc_resource_name   => 'User',

  dsc_resource_module => {

    name    => 'PSDesiredStateConfiguration',

    version => '1.8.0.0'

  },

  dsc_resource_properties  => {

    # properties

  }

}

# same idea (makes version optional)

dsc {'foouser':

  dsc_resource_name   => 'User',

  dsc_resource_module => 'PSDesiredStateConfiguration',

  dsc_resource_properties  => {

    # properties

  }

}